Wheel substitutes for land vehicles – With interposed friction drive belt
Patent
1977-08-15
1979-02-13
Shannon, John P.
Wheel substitutes for land vehicles
With interposed friction drive belt
291483, 305 57, B62D 5520
Patent
active
041392400
ABSTRACT:
A crawler shoe for the crawler tracks of a heavy-duty mining shovel or the like weighing 500 tons or more comprises a solid main body formed of high strength tempered steel plate (i.e., 100,000 P.S.I. yield strength), integrally formed projections, recesses, and pin holes on the body for detachably and articulately connecting the shoe to an adjacent shoe, end gussets welded to and projecting from the lateral sides of the body, a roller path plate of moderately hard high strength steel (i.e., between about 300 and 350 B.H.N.) welded to the upper surface of the main body, a pair of hollow drive lugs welded to the upper surface of the body on opposite sides of said roller path plate and formed of cast austenitic manganese steel, and a belly pan of high strength high hardness abrasion-resistant steel plate (i.e., between about 341 and about 391 B.H.N.) welded to the underside of the main body and the gussets.
The method for making the crawler shoe generally comprises the steps of: tempering by heat treatment high yield sheet steel; flame cutting the main body from the tempered high yield sheet steel to desired shape; drilling the pin holes; forming the roller path plate by depositing by welding moderately hard high strength steel on the upper surface of the main body and welding other components in place. An alternative method involves integrally forming an assembly comprising the roller path plate and hollow drive lugs by forging and welding this assembly to the upper surface of the main body.
REFERENCES:
patent: 2452921 (1948-11-01), Gillespie
patent: 3307882 (1967-03-01), McFayden
Borgman Neil E.
Profio Richard L.
Harnischfeger Corporation
Nilles James E.
Shannon John P.
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